... 5. Gray Scales: 256 6. Monitor: 10' black & white display 7. Body Marks: 64 marks 8. Channels: >=16channels digital beaming ... post-process(4 grades gamma correction)frame correlation, black/white reversal, left/right reversal, up/down reversal, edge enhancement ... birthCardio measurements: depth, slope, heart rate, period 24. Character Display: name, age, gender, hospital name, time, date, probe mode ...